What Is a Zirconia Ceramic Flange?
A zirconia ceramic flange is a ceramic connection part, made from zirconia (ZrO₂), that joins, seals or supports pipes, pumps, valves and process chambers. It is used where a metal or plastic flange would corrode, wear, contaminate the process or conduct current.
ADCERAX supplies three forms: a solid ceramic flange, a ceramic insert or lining fitted into a metal flange, and a ceramic-to-metal flange assembly. Each one is made to your drawing and matched to the mating flange, gasket and bolts.
Specifications of Zirconia Ceramic Flange
| Zirconia Ceramic Flange | ||
| Item No. | Outer Diameter（mm) | Length（mm) |
| AT-YHG-FL1001 | Customize | |
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Zirconia Material Data for Flange Selection
Use this table to compare zirconia grades. 3Y-TZP is the main grade for zirconia flanges. Mg-PSZ and Ca-PSZ are separate grades with their own data.
| Property (unit, condition) | 3Y-TZP | Mg-PSZ | Ca-PSZ |
|---|---|---|---|
| Stabilizer | Y₂O₃, about 3 mol% | MgO | CaO |
| Density, g/cm³, typical | 6.00–6.08 | 5.70–5.80 | 5.60–5.75 |
| Flexural strength, MPa, 20°C, typical | 800–1000 | 500–755 | 400–600 |
| Compressive strength, MPa, 20°C, typical | 2000–3500 | 2100 | 2000–2500 |
| Young’s modulus, GPa, 20°C, typical | 200–220 | 200 | 180–200 |
| Vickers hardness, GPa, typical | 12.5 | 11.5 | 10–11 |
| Fracture toughness K<sub>IC</sub>, MPa·m½, 20°C, method-dependent | 7.2–9.0 | 6–12 | 5–8 |
| Thermal expansion, 10⁻⁶/K, 40–80°C only | 11 | 10.5 | 10.0–10.5 |
| Thermal conductivity, W/(m·K), 20°C, typical | 3 | 2.5 | 2 |
| Volume resistivity, Ω·cm, 20°C | >10¹⁴ | >10¹⁴ | >10¹⁴ |
| Volume resistivity, Ω·cm, 300°C, typical | 10⁶–10⁸ | 10⁸–10¹⁰ | 10⁷–10⁹ |
| Water absorption, %, dense material, typical | 0 | 0 | 0 |
| Color | White | Ivory | White |
These are typical values measured on dense material test pieces. They help you choose a grade. They are not a pressure rating, bolt torque, leak rate, service temperature or service life for a finished flange.
How to Choose a Zirconia Flange
1. Pick the flange form. A solid ceramic flange suits smaller sizes and fully non-metallic lines. A ceramic insert or lining keeps a metal flange for strength and puts zirconia where the medium touches. A ceramic-to-metal assembly is used when the ceramic must be joined to a metal pipe or housing.
2. Pick the grade. 3Y-TZP zirconia is the usual choice for its strength and toughness. Choose Mg-PSZ or Ca-PSZ only when your specification calls for it. State the grade on your drawing so the material certificate matches.
3. Match the mating flange. Give us the mating flange standard and size, such as an ASME or EN designation, or a drawing of the mating part. This sets the bolt circle and bolt holes. The ceramic flange does not take on the pressure class of that standard.
4. Define the sealing face and gasket. Choose a flat, raised or grooved face and name the gasket material. Mark the gasket contact width, flatness and finish on the drawing.
5. Plan the bolt load. Specify the bolts, washers, torque or preload and tightening sequence. A ceramic flange should not be tightened to the default torque used for a metal flange.
6. State the operating conditions and tests. List pressure or vacuum, temperature and heating rate, the medium and its concentration, pipe loads and vibration, and any voltage. Tell us which pressure, leak or electrical tests the flange or assembly must pass.
Zirconia vs Alumina and Other Flange Materials
Zirconia vs Alumina
- Choose alumina for lower-cost furnace fixtures, steady thermal duty and electrical insulation.
- Compare zirconia when the flange faces mounting loads, bolt preload, impact or edge cracking.
- If an alumina flange fails around the bolt holes or bore, consider 3Y-TZP zirconia.
Choosing a Zirconia Grade
- 3Y-TZP: Common choice for structural zirconia flanges.
- Mg-PSZ and Ca-PSZ: Separate material grades with different properties.
- Specify the exact grade on the drawing. These grades are not interchangeable.
Zirconia vs Metal
- Metal: Ductile, weldable and compatible with standard gaskets and torque settings.
- Zirconia: Suitable for non-metallic, electrically insulating or wear-resistant assemblies.
- Zirconia requires even support, controlled tightening and proper alignment. Check thermal expansion against the mating metal over the full temperature range.
Zirconia vs Polymer
- PTFE or PVDF: Lower cost and easier to seal in light-duty applications.
- Zirconia: Better suited to abrasive slurry, mechanical loads and repeated cleaning.
- A polymer-lined metal flange can combine chemical resistance with structural support.
Packaging of Zirconia Ceramic Flange
Zirconia Ceramic Flange is carefully packed using molded foam inserts to prevent vibration and impact during international transit. Each unit is double-boxed and sealed in moisture-resistant outer cartons before being secured in reinforced plywood crates. This multi-layer protection ensures product integrity from factory to end-user site.
